IE11 tooltip doesn't work without web-animations

[dhuallanca]

Bug, feature request, or proposal:

Bug

What is the expected behavior?

Should display tooltip without web-animations.js

What is the current behavior?

Tooltip display randomly

What are the steps to reproduce?

https://plnkr.co/edit/KWtVa3v8S22NS6yUQx1L?p=preview

What is the use-case or motivation for changing an existing behavior?

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

"@angular/core": "^4.1.2",
IE11 11.0.9600.18665

Is there anything else we should know?

[angular-automatic-lock-bot]

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